//已知1英寸(in)=2.54厘米(cm)。输入英寸数，转换成厘米，并输出
import java.util.Scanner;

public class homework6 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double inch = sc.nextDouble();
        double cm = inch * 2.54;
        System.out.println(inch + " inch = " + cm + " cm");
    }
}
